If you want to barrel roll things - then get a plank and do it in that. Helicopters are great fun for lots of things...but let's be reasonable about it!
Keep the blue above the brown. Just remember that ones' rotor blades have a nasty habit of coming down (or up) to meet you if you're doing something silly.
I say this as a young pilot who intends to get old!
Flysafe (and the right way up!!)